Fach- und Universitätsübergreifendes
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It is not easy for practicing physicists to keep track of the ongoing philosophical debate concerning the "reality'' of the entities they manipulate or the "objective validity'' of the results of their work. In addition, the role of the observer and the theory of the measuring process seem to be themselves controversial. Therefore it may be appropriate to present an interpretation of quantum mechanics which corresponds to the perspective of most practicing physicists, although the author make...

Predicting Measurements at Unobserved Locations in an Electrical Transmission System
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Electrical Transmission Systems consist of a huge number of locations (nodes) with different types of measurements available.
Our aim is to derive a subset of nodes which contains almost sufficient information to describe the whole energy network.
We derive a parameter set which characterises every single measuring location or node, respectively.
Via analysing the behaviour of each node with respect to its neighbours, we construct a feasible random field metamodel over the whole transmissi...

Stability Analysis and Clustering of Electrical Transmission Systems
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A proper understanding and modelling of the behaviour of heavily loaded large-scale electrical transmission systems is essential for a secure and uninterrupted operation.
In this paper we present a descriptive analysis especially of low frequency oscillations within an electricity network and methods to assess the stability of the whole system based on an ARMAX model and the ESPRIT algorithm. Further we present two methods to separate the network into local areas, which is necessary for an ...

Comparison of Code-Pass-Skipping Strategies for Accelerating a JPEG 2000 Decoder
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Code-Pass-Skipping allows a JPEG 2000 decoder to be accelerated by sacrificing the output precision. This paper presents an evaluation on how the speed gain can be maximized and the quality loss minimized. In particular, the scenario of rendering a 24-bit preview of a Digital Cinema Package (DCP) with the maximum permitted bitrate is examined. A comparison shows, that a new proposed strategy outperforms the reference implementation from Kakadu Software v6 by up to 1 dB. Furthermore, it is sho...

DVB-C2 is the 3rd member of the DVB family of second generation transmission systems. Both the DVB-C2 Technical Specification (EN 302 769) [1] and the DVB-C2 Implementation Guidelines (TS 102 991) [2] have been approved by ETSI in 2011 in its current version. The two major building blocks of DVB-C2 are the LDPC (Low Density Parity Check) FEC (Forward Error Correction) Code and the OFDM (Orthogonal Frequency Division Multiplex) modulation scheme. Using DVB-C2, cable operators will be able to i...

In this paper we present our approach to extend current TV playout systems to fulfil the requirements posed by the Dynamic Broadcast system. After a review of the Dynamic Broadcast system we analyze the new flexibilities in the content delivery and study the challenging use cases. The key requirement on the playout system deduced from the use cases is the support of a flexible delivery of individual packetized content fragments. In our solution we modify the workflow in the playout system, bu...